raskins



B. J. HASKINS.

HOLDING AND ADRIVING DEVICE FOR TESTING PURPOSES.

APPLICATION FILED APR. I7, I9I9. 1,310,396.

Patented J u1y 15, 1919.

` 2 SHEETS-SHEET I.

INVENTOR. J H @51h/2 s.

I cn.. WASHINGTON. n. u.

3.1. HAsK|Ns.

HOLDING AND DRIVING DEVICE FOR TESTING PURPOSES.

APPLICATION FILED APR. I7. |919.

Patented July 15, 1919.

, 2 SHEETS-SHEET 2 TOR.

ORNE Y.

THE COLUMBIA PLANOGRAPM co.. WASHINGTON, D. c.

"1 En s'iniiis PATEN onirica.

BUTLER J.

HASKINS, OF KANSAS CITY, MISSOURI, ASSIGNOR TO E. S. COWIE ELECTRIC CO., OF KANSAS CITY, MISSOURI, A CORPORATION OF MISSOURI.

HOLDING AND DRIVING DEVICE FOR TESTING PURPOSES.

Specification of Letters Patent.

Patented July 15, 1919.

Application led April 17, 1919. Serial No. 290,750.

T0 all whom it may concern: p

Be it known that I, BUTLER J; HAsiiiNs,

a citizen of the United States, residing at Kansas City, in the county of Jackson Vand State of Missouri, have invented certain new and useful Improvements in Hold-ing and Driving Devices for Testing Purposes, of which the following is a specification.v

This invention relates to holding and' driving devices for testing purposes and' more especially to a universal holding and driving device for testing automotive ve-` movement due to wear or because it has been slightly bent. A further object is toA produce a test device of simple, strong, du"

rable and comparative inexpensive construction.

Vith .these objects in view the invention' consists in certain novel and useful features of construction and combinations of parts as hereinafter described and claimed; and

'in order that it may be fully understood,

reference is to be had to the accompanying drawings, in which:

Figure 1, is a plan view of a testing de-v vice embodying the invention.

Fig. 2, is a lsection on the `line III-II of Fig. 1.

Fig. y3, is a side view of the testing device. i l l Fig. 1, is a front view of the saine. Referring to the drawings in detail, 1 indicates a suitable benchor support, and mounted thereon is a pedestal or stand 2 bifurcated at its upper end asA at 3 to produce a pairfof spaced arms constituting journal bearings fora shaft 4 adapted to be driven by anyv suitable means at any desired or predetermined speed, and said arms are provided at their outer aides with outwardly projecting hubs 5 disposed concentrically of the shaft andA forming journals for a pair of eccentrics 6 fitting loosely around the shaft.

An arm 7 is formed with an opening to produce a pair of parallel side portions bearing recesses 8 conforming to and snugly embracing the upper halves of the eccentrics 6, bearing caps 9 secured to the lower edges of said side portions being recessed in their upper edges to conform to and engage the lower halves of said eccentrics which thus constitute a pivotal point for said arm 7 and a means whereby said arm can be adjusted endwise transversely of the axis of said shaft.

The rear ends of the side portions of the arms are connected by a relatively heavy portion or weight 9a, and suspended therefrom by a cablelO is a counterweight 11 upon which is superposed removable weights 12, so as to facilitate counterbalanc-` ing the arm to compensate for endwise adjustment thereof and for the weight of an electric tachometer mounted upon said arm 7, as is contemplated. As the use of the tachometer is not imperative however, it is not illustrated.

The front end of the arm 7 is bifurcated and forms in conjunction with caps 13 bearings for a short lshaft 14 arranged parallel with shaft 4, and equipped at one end with a chuck 15 and at its opposite end with a belt pulley 16 `engaged by a belt 17, for transmitting power to the tachometer or equivalent device.

The swinging arm 7 is provided with locking means whereby the elevation of the one of the caps 13 of the arm 7 so as to move with the latter, and fitted around said rod and bearing against opposite sides of said bracket are upper and lower springs 21 and 22, respectively enga-ging collars 23 and 24 `secured upon said rod and tending to hold ,the arm 7 yieldingly at a fixed height when the rod'itself is located against 'endwise orvertical movement, and to accomplish lockin" the rod against such movement a handoperated screw 25 is mounted in the threaded Sleeve V.1 9 and impinges against the side of said rod.

A cushion spring A26` fits Varound rod 18 and rests upon the table or support, and the collar 27 mounted on the irod is adapted by engagement with said spring to cushion and limit downward movement ofthe ,front `end of the arm and thereby guard against 'any 'chance of injury to the chuck or other parts carried by said arm, such otherparts comprising a link belt 29 for transmittingvpower from a grooved drive wheel 2 8 secured on shaft ,4, to a grooved wheel 30, secured lon the chuckshaft 14.

Mountedupon the table at the, chuck side of the Ikswinging arm, is a vise .or holding themotor or other device, notsh'own, to be tested. The vise comprises a pair of parallel rods 31. mounted in brackets32secured to the table, the rods extending parallel with shaft 4 and fbeing equipped with slidable sleeves 33. It also comprises parallel rods 3 5 extending at right angles to the rods 31 Iand journaled in said sleeves, and `with a frame l36 adjustable back and `forth on rods y35 and comprising ,a stationary jaw 37 and a movablejaw .'38, one of which shouldbe nonmagnetic, together with aljawadjusting screw 39` and al mechanism 40 for locking the jaws on the device being tested, and `leavingthe trameu36 and the device being tested, free for back and forth movement upon rods 35, this locking mechanism not being detailed as it forms a `p 'art of standard Ivise equipment and forms no indispensable part of this invention. The motor or lthe like to be tested, is clamped `between the jaws 37 Aand 38 by the adjustment of the screw 3 9 so as to dispose the `shaft ot' the motorin'the vertical plane of the chuck, shaft as nearly as practicable, and then the rods 35 together y"with said jaw and the motor or.v the liketo v1be tested, are slid laterally on theprods 31 to dispose the ,end of the shaft of the motor in proper relation to the chuck, the arm 7 being Vadjusted vertically to l,dispose the axis of the;

chuck shaft in the samehorizontal pla-ne `as the axis of the lmotorlshaft, after which the arm is secured yagainst movement` except `that permitted Aby the springs 21 and 22, by `the proper adjustment of the hand screw 25, and to guard against any chance of the motor backing away from the chuck, a set vson in charge of the test, knowingthe rating screw 41 is mounted in one of the sleeves 33 for impingement 0n the corresponding rod 31.

From the foregoing it will be apparent that the motor, magneto or other device to be tested can be easily and quickly secured in the vise and lined up and engaged with the chuck and that when so positioned, it can be driven at a predetermined speed from shaft 4, which speed through an electric tachometer or the like and suitable electric indicating apparatus of well-known character, will sho'w at all times the R. P. M. of the apparatus being tested. The apparatusubeiiig tested is also electrically connected with suitable apparatus which will indicate the E. M. F., amperage, voltage, resistance and the like of such `tested apparatus. It will thus be understood, ofcourse, that the per- Of the apparatus being tested, 'can quickly ,determine the condition of the apparatus of any` make of automotive electric equipment.

To ,take up slack in the drive belt, due to stretching thereof, the Te'ccentrics will be turned to effect endwise adjustment of arm 7 and increase the1 distance ,between drive shaftjt andthe driven or chuck shaft 14, and the, counter-balancing of the said arm can be maintained by adding one or more weights 12; To protect the operator from injury through entanglement with thepower transmitting belt, a guard 34, is secured to arm 7 over said belt.

From the above description it will be ap- `parent that -I haveproduced a device of the character describech. which makes provision for limited vuniversal ,movement of the shaft of the generator or other device being tested,

and while I have shownand described, the `prei'erred embodiment ofthe same, it will ya 'device embodyingnnea'nsfor holding 'equipment to be tested, adapted for adjustment toward the 4said chuck and free to vibrate radially of the axis of said chuck.

2. In holdinjg` and'driving devicesforltestying automotive equipment, the combination of a swinging arm, a shaft j ournaled therein and provided at one end with a chuck, yieldying means forholdingsaid arm, against unlimited .swinging movement, with a device embodying means for holding equipmentto be tested, adapted for adjustment toward thesaidchuck and 4free to vibrate radially of the axis of said chuck, and means to lock said device against movement toward or from said chuck.

3. In holding and driving devices for testing automotive equipment, the combination of a swinging arm, a shaft journaled therein and provided at one end with a chuck, yielding means for holding said arm against unlimited swinging movement, with a vise having a part adjustable toward and from the chuck end of said shaft, and a part carried by the said adjustable part, and free to vibrate radially of the axis of said chuck shaft.

4. In apparatus of the character described, an arm for swinging movement, having a iixed fulcrum, means for adjusting the arm endWise relative to its fulcrum, means for counter-balancing the arm, a drive shaft having its axis coincidental with the said fulcrum, a shaft journaled in said arm and disposed parallel With the said drive shaft and geared thereto, and yielding means for limiting swinging movement of the said arm.

5. In apparatus of the character described, an arm for swinging movement, having a fixed fulcrum, means for adjusting the arm endwise relative to its fulcrum, means for counter-balancing the arm, a drive shaft having its axis coincidental with the said fulcrum, a shaft journaled in said arm and disposed parallel with the said drive shaft and geared thereto, an adjustable rod, a bracket movable with said swinging arm, and fitting slidingly on said rod, and a pair of counteracting springs bearing against opposite sides of said bracket and prssing in opposite directions against said ro In testimony whereof I a'liix my signature.

BUTLER J. HASKINS.

Copies ci this patent may be obtained for ve cents each, 'by addressing the Commissioner of Patents, Washington, D. C. 

